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Clark, Kenneth Bancroft

(Encyclopedia)Clark, Kenneth Bancroft, 1914–2005, American psychologist and educator, b. Panama Canal Zone, grad. Howard (B.A., 1935) and Columbia (Ph.D., 1940). Clark taught psychology at Howard (1937–38) and ...

fer-de-lance

(Encyclopedia)fer-de-lance fĕrˌ-də-lănsˈ [key], highly poisonous snake, Bothrops atrox, found in tropical South America and the West Indies. A pit viper, related to the bushmaster and the rattlesnake, it has h...

flint, mineral

(Encyclopedia)flint, variety of quartz that commonly occurs in rounded nodules and whose crystal structure is not visible to the naked eye. Flint is dark gray, smoky brown, or black in color; pale gray flint is cal...

Mastroianni, Marcello

(Encyclopedia)Mastroianni, Marcello märchĕlˈlō mästrōyänˈnē [key], 1924–96, Italian movie actor, b. Fontana Liri, Italy. Known for his striking good looks and his world-weary introspective air, he was di...

airglow

(Encyclopedia)airglow, faint diffuse illumination of the sky originating in the upper atmosphere. Although it occurs at all times of day throughout the upper atmosphere, it is most typically visible to an observer ...

agouti

(Encyclopedia)agouti əgo͞oˈtē [key], name applied to rabbit-sized rodents of the genus Dasyprocta, found in Central and South America and in the West Indies. They have slender limbs with five front and three hi...

cairn terrier

(Encyclopedia)cairn terrier, breed of small working terrier developed on the Isle of Skye in the 19th cent. It stands about 10 in. (25 cm) high at the shoulder and weighs about 14 lb (6.4 kg). The weather-resistant...

sable

(Encyclopedia)sable, species of marten, Martes zibellina, found in Siberia, N European Russia, and N Finland. This carnivorous mammal is highly valued for its thick, soft fur, which is dark brown or black, sometime...

tourniquet

(Encyclopedia)tourniquet to͝orˈnĭkĕt, –kā, tûrˈ– [key], compression device used to cut off the flow of blood to a part of the body, most often an arm or leg. It may be a special surgical instrument, a ru...

Yorkshire terrier

(Encyclopedia)Yorkshire terrier, breed of small, spirited toy dog originated and developed in Yorkshire, England, in the mid-19th cent. It stands about 9 in. (22.8 cm) high at the shoulder and weighs from 4 to 7 lb...